Four days of immersion in nature, and the corresponding disconnection from multi-media and technology, increases performance on a creativity problem-solving task by a full 50%.
Atchley Ruth A., Strayer David L., Atchley Paul. (2012) Creativity in the Wild: Improving Creative Reasoning through Immersion in Natural Settings. PLoS ONE 7(12): e51474. doi:10.1371/journal.pone.0051474